[Amps] Is there any VISIBLE difference of 4CX1000A and 4CX1500B ??

[Steve Thompson]

Ulli Grunow wrote:
> Hi there,
> Can someone tell me, how to distinguish visually a 4CX1000A from a
> 4CX1500B from outside ?!?
>  
> There is no printed label anymore visible. The tube in question is used
> and comes from a marine equipment manufacturer DEBEC (Germany)
>  
> Is there any difference, so that looking on the tube we can definitely
> say that it is a 4CX1000A or 4CX1500B ?!
> Is there a sinple electrical test probably so we can find out ?
Eimac data says 4CX1000A runs 6V/9A heater, 6V/10A for 4CX1500B.

Steve